基于结构空气中模态参数的水下声振响应估算方法研究
详细信息 查看官网全文
- 英文论文题名：Estimation method of vibration and radiation responses of submerged structures based on modal parameters in air
- 论文作者：李祖荟 ; 陈美霞 ; 谢坤
- 英文论文作者：LI Zu-hui ; CHEN Mei-xia ; XIE Kun ; College of Naval Architecture and Ocean Engineering ; Huazhong University of Science and Technology
- 年：2016
- 作者机构：船舶与海洋工程学院华中科技大学;
- 论文关键词：声辐射阻抗 ; 附加质量 ; 附加阻尼 ; 模态叠加法
- 英文论文关键词：radiation impedance ; added mass ; added damping ; modal superposition method
- 会议召开时间：2016-09-17
- 会议录名称：2016年度声学技术学术会议论文集
- 语种：中文
- 分类号：TB56
- 学会代码：SXJS
- 会议名称：2016年度声学技术学术会议
- 会议地点：中国湖北武汉
- 主办单位：船舶振动噪声重点实验室、湖北省声学学会
- 学会名称：《声学技术》编辑部
- 页数：5
- 文件大小：504k
- 原文格式：D
- 会议级别：全国
摘要
由于工程实际中结构水下振动声辐射试验较难开展,本文提出了一种由结构空气中模态参数预报水下声振响应的估算方法。首先,采用边界元理论及辐射阻抗的定义将流体对结构作用表示为附加质量和附加阻尼的形式;然后,采用数值软件SYSNOISE计算结构水中附加质量和附加阻尼;最后,基于模态叠加法结合空气中模态参数实现结构水下声振响应估算。针对平板和圆柱壳,采用本文方法对其水下声振响应进行估算,结果表明:本文估算的响应曲线与数值结果吻合良好,均方振速和辐射声功率曲线前三个峰值误差均在5d B以内。
Due to the difficulty to conduct the underwater test, a method is presented to estimate the vibration and radiation responses of submerged structures through the modal parameters in air. Firstly, the interaction of the fluid and the structure is expressed by the added mass and added damping through the boundary element theory and the definition of the radiation impedance. Secondly, the added mass and added damping is calculated with the numerical software SYSNOISE. Finally, the vibration and radiation responses of the submerged structures are estimated by the modal superposition method with the modal parameters in air. The vibration and radiation responses of the submerged plate and the cylindrical shell are estimated with the method of this paper, which are compared with numerical software calculation result, the difference of the former three peaks of the curves of the mean quadratic velocity and the radiated sound power are within 5d B.
Due to the difficulty to conduct the underwater test, a method is presented to estimate the vibration and radiation responses of submerged structures through the modal parameters in air. Firstly, the interaction of the fluid and the structure is expressed by the added mass and added damping through the boundary element theory and the definition of the radiation impedance. Secondly, the added mass and added damping is calculated with the numerical software SYSNOISE. Finally, the vibration and radiation responses of the submerged structures are estimated by the modal superposition method with the modal parameters in air. The vibration and radiation responses of the submerged plate and the cylindrical shell are estimated with the method of this paper, which are compared with numerical software calculation result, the difference of the former three peaks of the curves of the mean quadratic velocity and the radiated sound power are within 5d B.
引文
[1]纪刚,张纬康,周其斗.静水压力作用的水下结构振动及声辐射[J].中国造船,2006(03):37-44.JI Gang,ZHANG Wei-kang,ZHOU Qi-dou,Vibration and Radiation from Underwater Structure Considering the Effect of Static Water Preload[J].Shipbuilding of China,2006(03):37-44.
[2]王路才,周其斗,纪刚,谢志勇,莫登沅.以舱段模型代替整艇模型进行噪声估算的可行性探讨[J].中国舰船研究,2010,06:26-32.Wang Lu-cai,Zhou Qi-dou,Ji Gang,Xie Zhi-yong,Mo Deng-yuan.Approximate Method for Acoustic Radiated Noise Calculation of Sub Cabin Model in Replacing Full-Scale Model[J].Chinese Journal of Ship Research,2010,06:26-32.
[3]刘忠族,黄玉盈,钟伟芳.无限长圆柱壳附连水质量与波数的关系[J].中国造船,1998(01):52-56.LIU Zhongzu,HUANG Yuying,ZHONG Weifang.Relationship between Added Mass and Wave Mumbers of an Infinitely Long Cylinderical Shell Submerged in Water[J].Shipbuilding of China,1998(01):52-56.
[4]魏建辉,陈美霞,和卫平,等.基于空气中模态参数的水中结构固有频率估算方法研究[C],中国湖南长沙:第十二届船舶水下噪声学术讨论会,2009.WEI Jianhui,CHEN Meixia,HE Weiping,et al.Based on the modal parameters of the water in the air structure natural frequency estimation method research[C],12th academic seminar on underwater noise of ships,2009
[5]李增刚,詹福良等.Virtual.Lab Acoustics声学仿真计算高级应用实例[M].北京:国防工业出版社,2010.LI Zhenggang,ZHAN Fuliang,et al.Virtual.Lab Acoustics senior acoustic simulation application example[M].Beijing:National Defence Industry Press,2010.
[2]王路才,周其斗,纪刚,谢志勇,莫登沅.以舱段模型代替整艇模型进行噪声估算的可行性探讨[J].中国舰船研究,2010,06:26-32.Wang Lu-cai,Zhou Qi-dou,Ji Gang,Xie Zhi-yong,Mo Deng-yuan.Approximate Method for Acoustic Radiated Noise Calculation of Sub Cabin Model in Replacing Full-Scale Model[J].Chinese Journal of Ship Research,2010,06:26-32.
[3]刘忠族,黄玉盈,钟伟芳.无限长圆柱壳附连水质量与波数的关系[J].中国造船,1998(01):52-56.LIU Zhongzu,HUANG Yuying,ZHONG Weifang.Relationship between Added Mass and Wave Mumbers of an Infinitely Long Cylinderical Shell Submerged in Water[J].Shipbuilding of China,1998(01):52-56.
[4]魏建辉,陈美霞,和卫平,等.基于空气中模态参数的水中结构固有频率估算方法研究[C],中国湖南长沙:第十二届船舶水下噪声学术讨论会,2009.WEI Jianhui,CHEN Meixia,HE Weiping,et al.Based on the modal parameters of the water in the air structure natural frequency estimation method research[C],12th academic seminar on underwater noise of ships,2009
[5]李增刚,詹福良等.Virtual.Lab Acoustics声学仿真计算高级应用实例[M].北京:国防工业出版社,2010.LI Zhenggang,ZHAN Fuliang,et al.Virtual.Lab Acoustics senior acoustic simulation application example[M].Beijing:National Defence Industry Press,2010.